Lock for dump-car doors.



R. W. BURNETT.

LOCK FOR DUMP CAR DOORS.

APPLIGATION FILED MARA 25, 1912,

1,081,204, Patented Deo. 9, 1913.

coLumuA PLANOGRAPH co..wAsmNTON. D. c,

Specification of Letters Patent.

latented Dee. 9,1913.

Original application filed October 17, 1911, Serial No. 655,253. Divided and this application iiled March 25, 1912. Serial No. @96:10:32

To all whom t may concern.'

Be it known that l, ltioirann 1Winn?. Bun ruz'r'r, a citizen oi the United States of America, residing at the city ot Montreal, Province oit Quebec, Dominion of Canada7 have invented certain new and useful l1nprovements in Locks tor Dump-Car Doors; and l do hereby declare that the following is a full, clear, and exact description thereof.

My invention relates particularly to locking mechanism tor releasing a gang of doors individually or collectively, and it has tor its object to provide a simple and ei'lective means rter the purpose.

'll' he invention may be said briefly to consist of a series of locking devices adapted to sustain a series et doors in closed position and flexibly connected to a common operating member in order that one or more of the locking devices may be manually operated and their doors released without affecting the other doors of the series.

For full comprehension, however7 of my invention. reference must be had to the accompanying drawings forming a part of this speciiication in which similar reterence characters indicate the same parts, and wherein Figure 1 is a front elevation of a dump car illustrating a series of doors with my invention applied thereto; Fig. 2 is a similar vienT with the locking mechanism in the act of releasing all the doors of the series simultaneously; Fig. 3 is a transverse vcrtical sectional view taken on line rt A Fig. 1; Fig. e is an enlarged detail elevation of one oit the locking devices. Fig. 5 is a horizontal sectional view taken on line A A Fig. 4.

My invention as above mentioned is adapted tor use in locking the discharge doors of dump ears and more particularly the doors controlling the discharge from dump cars having hoppers of the type disclosed in my pending application tiled on Uctober 17, 1911, under Serial No. (355.253, which is shown in the accompanying drawings tor purposes of illustration but not specifically described nor claimed. as it is covered in the said earlier application.

rlhe hopper tloor is indicated at b the sides at c and the doors at Z with oilset free edges e; the latter being disposed in a nearly vertical plane when in service sustaining comparatively small load and may be comparatively lightly made and consequently do .not require more or less complicated closing mechanism but are closed by hand, the only mechanism necessary being tor locking them `when closed.

lily present invention is confined to the locking mechanism and embodies clamping devices in conjunction therewith. t series oit horizontally alined bars f extend lengthwise of the ear above and adjacent to the doors, a bar tor each door. Each bar has two or more curved presser dogs g carried rigidly thereby in bearing relation with the oilset edge e of the door and a handle or lever t by` means of which the presser dog is caused to torcethe door, after having been iii-st closed by hand, into tight bearing relation with the door-trame. Each handle or lever when in clamping position registers between the arms e' ot a bracket j riveted to the door, such arms being oppositely recessed to eonjointly torni a socket for a key m suspended by a chain n, or other `flexible connection, -from a shaft o rotatably mounted in bearing brackets p on the car body, one or both ends of the shaitt being squared as at s for engagement by a wrench or spanner.

ln operation no particular skill is needed. rlhe doors are closed by hand, the handles being lifted' up to permit it, after the closing of the doors they are clamped to the frame and the operator drops the keys into their sockets. Any door may be opened by knocking out its pin or all the doors may be opened at once by turning 'the shaft s and winding the chains thereon thus removing all the keys simultaneously.

l do not claim the specific clamping device illustrated as the same terms the subject-matter of a separate application granted Aug, 12, 1913, under No. 1,069,762 and a divisional part of application Serial No. 655.258, tiled October 17, 1911.

lWhat l claim is as follower- 1. rlhe combination with a car iframe and a series of dump doorsj of individually manually operative locking devices for the respective doors, an operating member and a series of permanent llexible connections between the individual locking devices and the operating member for the purpose ci operating all ot the locking devices si1nultaneously and permitting the manual operation thereof individually.

2. The combination with a oar frame and a. series of dump doors, of a series of Clamping, handles or levers engaging the doors, brackets upon the doors with which the handles or levers register, keys looking the handles or levers in the brackets, a shaft rotatably mounted upon the oar frame, and a series of flexible Connections between the 10 keys and shaft.

Intestiinony whereof I have signed my name to this speoioation in the presence of two witnesses.

RICHARD WEBB BURNETT.

Witnesses:

E. R. Prrls, GORDON G. COOKE.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents. Washington, I). C. 

